(CNN) – Thursday's Supreme Court ruling upholding President Barack Obama's health care law has Americans divided, according to the first survey following the landmark decision.

Friday's poll from USA Today/Gallup showed 46% of Americans agree with the court's ruling, with 46% saying they disagree. Opinions were predictably split along party lines: 79% of self-identified Democrats agreed with the decision to uphold the president's law, while 83% of Republicans disagreed with the ruling.

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